Light providing unit, display device including the same, and method of manufacturing display device

Abstract

A display device includes: a light source configured to generate a light; a display panel configured to display images using the light; a light guide having at least one surface adjacent the light source; and an optical member between the light guide member and the display panel. The optical member includes: a low refractive index layer on a light exit surface of the light guide member; a first cover layer on the low refractive index layer; and a light conversion layer on the first cover layer and configured to convert a wavelength band of an incident light.

What is claimed is: 
     
       1. A display device comprising:
 a light source configured to generate a light; 
 a display panel configured to display images using the light; 
 a light guide having at least one surface adjacent the light source; and 
 an optical member disposed between the light guide and the display panel, 
 wherein the optical member comprises:
 a low refractive index layer on a light exit surface of the light guide; 
 a first cover layer on the low refractive index layer; and 
 a light conversion layer on the first cover layer, and the light conversion layer being configured to convert a wavelength band of an incident light, 
 
 wherein the first cover layer comprises:
 a first barrier layer on the low refractive index layer; and 
 a second barrier layer on the first barrier layer, the second barrier layer having a density that is lower than a density of the first barrier layer. 
 
 
     
     
       2. The display device of  claim 1 , wherein a refractive index of the low refractive index layer is greater than or substantially equal to about 1.1 and less than or substantially equal to about 1.3. 
     
     
       3. The display device of  claim 1 , wherein the first barrier layer has a refractive index that is higher than a refractive index of the second barrier layer. 
     
     
       4. The display device of  claim 1 , wherein the second barrier layer has a pore density that is higher than a pore density of the first barrier layer. 
     
     
       5. The display device of  claim 1 , wherein the first barrier layer and the second barrier layer comprise a substantially same material. 
     
     
       6. The display device of  claim 1 , wherein the first barrier layer and the second barrier layer comprise materials different from each other. 
     
     
       7. The display device of  claim 1 , wherein each of the first barrier layer and the second barrier layer comprises at least one of SiO x , SiN x , or SiO x N x . 
     
     
       8. The display device of  claim 1 , wherein a sum of thicknesses of the first barrier layer and the second barrier layer is greater than or substantially equal to about 3000 angstrom (Å). 
     
     
       9. The display device of  claim 1 , wherein a sum of thicknesses of the first barrier layer and the second barrier layer is greater than or substantially equal to about 6000 Å. 
     
     
       10. The display device of  claim 1 , wherein a thickness of the first barrier layer is greater than or substantially equal to about 1200 Å and is less than about 4800 Å. 
     
     
       11. The display device of  claim 1 , further comprising a second cover layer on the light conversion layer. 
     
     
       12. The display device of  claim 11 , wherein the first cover layer covers a side surface of the low refractive index layer, and
 the second cover layer covers a side surface of the light conversion layer. 
 
     
     
       13. A light providing unit comprising:
 a light source configured to generate a light; 
 a light guide having at least one surface adjacent the light source the light guide being configured to receive the light; and 
 an optical member on the light guide member, 
 wherein the optical member comprises:
 a low refractive index layer on a light exit surface of the light guide member; 
 a barrier layer on the low refractive index layer; and 
 a light conversion layer on the barrier layer, the light conversion layer being configured to convert a wavelength band of an incident light, and 
 
 a density of a first portion of the barrier layer is greater than a density of a second portion of the barrier layer, wherein the second portion is farther from the low refractive index layer than the first portion of the barrier layer.